Secondary dentin usually forms within the tooth
a after the completion of the apical foramen
b before the completion of the apical foramen
c nearest to the dentinoenamel junction
d in response to tooth trauma

Question

Secondary dentin usually forms within the tooth:
a. after the completion of the apical foramen.
b. before the completion of the apical foramen.
c. nearest to the dentinoenamel junction.
d. in response to tooth trauma.

Ahana · Answer

The correct answer is:

a. after the completion of the apical foramen.

Secondary dentin forms after the apical foramen has been completed. It is laid down by odontoblasts throughout the life of the tooth, but at a slower rate than primary dentin. This type of dentin is usually produced in response to normal aging or stimuli such as mild irritation or wear.

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